1997
DOI: 10.1039/a606553h
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Continuous Hydride Generation System for the Determination of Trace Amounts of Bismuth in Metallurgical Materials by Atomic Absorption Spectrometry Using an On-line Stripping-type Generator/Gas–Liquid Separator

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Cited by 26 publications
(16 citation statements)
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“…Excellent sensitivity and reproducibility was obtained because of the low residence volume ( ≈ 200 ml) inside the chamber of the generator-gas-liquid separator. As has been reported for other hydride-forming elements, we have also observed interferences caused by various metal ions in solution, 11 but any possible interference is efficiently controlled with a solution of thiourea (0.2%)-KI (10%). Results obtained using the standard addition method indicated that the proposed procedure overcame problems related to the low concentration of bismuth in urine and, in addition, presented excellent precision and accuracy, as may be verified by comparative methodologies.…”
Section: Resultssupporting
confidence: 80%
See 1 more Smart Citation
“…Excellent sensitivity and reproducibility was obtained because of the low residence volume ( ≈ 200 ml) inside the chamber of the generator-gas-liquid separator. As has been reported for other hydride-forming elements, we have also observed interferences caused by various metal ions in solution, 11 but any possible interference is efficiently controlled with a solution of thiourea (0.2%)-KI (10%). Results obtained using the standard addition method indicated that the proposed procedure overcame problems related to the low concentration of bismuth in urine and, in addition, presented excellent precision and accuracy, as may be verified by comparative methodologies.…”
Section: Resultssupporting
confidence: 80%
“…The FI-HG manifold has been described in detail previously. 11 All analytical measurements were carried out with a T-shaped quartz cell (17 cm long 3 0.8 cm id), electrically heated and supported in the optical path of a Varian (Palo Alto, CA, USA) atomic absorption spectrometer, Model Gemini AA 12/1475, provided with a deuterium background corrector. A nitrogen flow of 120 ml min 21 was used.…”
Section: Instrumentationmentioning
confidence: 99%
“…A unidade de comutação para a introdução das amostras é um injetor tipo proporcional [2]. Para a separação do hidreto formado é utilizado um separador gás-lí-quido do tipo varredura [3]. O hidreto de selênio gerado é separado da fase líquida no separador gás-líquido, sendo transportado ao atomizador usando nitrogênio ultra-puro como gás de arraste com vazão controlada por um regulador de vazão de gás.…”
Section: Introductionunclassified
“…Some advantages of the generation of volatile hydrides are: the analyte is separated from the matrix, resulting in better precision; the selectivity is enhanced due to the reduction of interfering species; using a batch system it may be possible to have enrichment of the analyte; the limits of detection (LOD) are improved, allowing the determination of trace-elements and environmental studies; and the systems can be automated, reducing the amounts of reagents and increasing the transport efficiency of the analyte to the atomizer. [4][5][6] A quartz tube atomizer (QTA), heated in a flame or electrically, is generally used for the atomization of hydride forming elements, reaching temperatures of about 700-1100 uC. QTA allows a longer residence time of the analyte in the spectrometer optical path, enhancing the sensitivity with low signal noise and excellent LOD.…”
Section: Introductionmentioning
confidence: 99%